Segment and Angle Proofs

Front

What is the definition of supplementary angles?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always congruent.

Front

What does the Substitution Property of Equality state?

Back

If two values are equal, one can be substituted for the other in any expression.

Front

What is the Transitive Property of Equality?

Back

If a = b and b = c, then a = c.

Front

What is the definition of congruent segments?

Back

Two segments are congruent if they have the same length.

Front

What is the definition of a bisector?

Back

A bisector is a line, ray, or segment that divides another segment or angle into two equal parts.

Front

What is the Subtraction Property of Equality?

Back

If a = b, then a - c = b - c for any number c.

Front

What is the definition of a linear pair?

Back

A linear pair is a pair of adjacent angles formed when two lines intersect. The angles are supplementary.

Front

What is the definition of complementary angles?

Back

Two angles are complementary if the sum of their measures is 90 degrees.

Front

What is the definition of a transversal?

Back

A transversal is a line that intersects two or more lines at different points.